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Hi from Semafore. The key is to contour a dome on the railhead by sanding. I use 400 W/D, on a small wood block, then the 600 W/D. The block is firm yet forgiving. The arc produced on the rail ensures good electical contact to the wheels, and better adhesion for the drivers.  The inner faces of the railhead make contact with the flanges, so do this. too. The sanding also removes the extrusion texture on the rails. Use Moderate pressure. Wipe the spoil off good, for the grit will embed into your SS device. Then the burnish. Moderate to heavy, not too heavy. On the point, use lightler pressure, just do more passes. Occasionally it's good to sand the SS device, to remove accumalation and grit. Then wipe the rails again. You're done! Be good. Be well. Be Trained! Semafore
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